Micrometer-calipers.



H. W. VOGES.

MICROMETER CALIPERS. APPLICATION man JUNE 2!, 1916.

l ,z lfififi Patented Oct. 23, 1917.

I l I l I I I I WITNESS: I INVEN TOR, fi v 11. Wj Zye,

ATTORNEY.

rinrrn A erase MICROIVIETER-CALIPERS.

Specification of Letters Patent.

' Patented Oct. 23, 1%17.

Application filed June 21, 1916. Serial No. 105,027.

1 '0 all whom 2'25 may concern Be it known that I, Hermann XV. Voens, a citizen of the United States of America, and resident of Springfield, in the county of Hampden and State of Massachusetts, have inventedv certain new and useful Improvements in lViicrometereCalipers, of which the following is a full, clear, and exact description.

This invention relates to a micrometer caliper having interchangeable frames of difierent sizes so that by having one micrometer barrel and a plurality or series of different sized frames with which the barrel may be detachably connected, one may have, at greatly lessened expense than heretofore, instruments of different measuring ranges.

T he object of the invention is to improve the caliper device especially in respect to the means of detachable connection between the barrel portion and the bow or frame portion to the end of securing accuracy as regards the relations of the parts, convenience of op eration, reliability, simplicity and inexpensiveness of construction.

The invention is described in conjunction with the accompanying drawings and is set forth in the claims.

In the drawings Figure 1 is a side view showing the caliper comprising interchangeable parts in their assembled relations.

Fig. 2 is a plan view and partial horizontal section as taken on line 2-2, Fig. 1.

Fig. 3 is a side view of one of the frames or hows of a different size from the one shown in Fig. 1, and understood as being interchangeable therewith.

in the drawings, A represents the barrel portion of the caliper, which, as may be suffi riently said, is of any of the usual or standard constructions; and this barrel portion (if the caliper is provided with a tang or projection B, which extends from the barrel angular-1y to the axis thereof, the outer edge portion a. of which is of reversely beveled or V-shape, as shown in Fig. 2.

C C represent interchangeable separately formed bow-shaped yokes or frames, the one in Fig. 1 being considerably shorter thanthe one represented in Fig. 3.

Each of the frames C, to be provided is identically formed at its end portion. opposite the anvil member 5 with a parallel edged slideway or channel 02 for the engage ment therein of the tang B of the barrel member. i

As here represented the channel cl is open to the front face of the frame, and the'outer wall or boundary of the channel is undercut as represented at f for the interlocking engagement therein of the angularly formed edge of the tang.

The frame has a sector shaped recess 9 within its front face adjacentan opening to the inner side-wall of the channel, and the arc shaped wall of this recess is formed with an undercut bevel 7a.. f

D represents a member, which has the form of. a disk or circular block mounted on the front of the tang, on the pivot screw z', and; capable of rotative movement.

This member D is made at its inner portion with a cam m, which advantageously may be of eccentric form or approximately such.

This cam m is accommodated in a shallow socket or rabbet 0 within the front face of the tang and which socket opens to one edge of the tan The edge j of the cam is shown as of angular form or beveled in a direction so that when turned to bind the tang in the channel of the frame, the cam will also acquire an interlocking engagement with the undercut wall forming the boundary of the sector shaped niche or recess 9.

The said recess 9 in conjunction with the rotative binding cam. serves as means for properly positioning the tang in its arrangement on the frame so that the axis of the barrel member will be coincident with the axis of the anvil.

The cam provided member D may be 130- tated by being grasped between the thumb and finger or,as shown, the member D is provided with a small lever handle 75.

As the greatest expense in the manufacture of a micrometer caliper is in the construction of the portions comprised in the barrel, it will be readily understood that by providing one micrometer barrel having the tang and a number of frames of different sizes, all caliper measuring requirements are readily and cheaply provided for.

I claim 1. The combination with the barrel portion of a micrometer caliper provided with" tang extended from the barrel portion angnlarly to the axis of he latter, of a separately formed bow shaped yoke or frame having in one end portion thereof a channel opening to the face of the frame,rand a member pivotally mounted'on the tang and provided with a cam Which under. the rotative movement of the pivoted member is operable to engage one .Wall of the channel and b'ind'the tang and the portion of the instrument carried thereby firmly to the frame.

2. The combination with the barrel por tion of a caliper provided With a tangextended from the barrel portion ang'ularly to the axis of the latter, of a separately formed boW sh'apedyoke or frame having in one end portion thereof a channel which opens to the face of the frame and one side Wallof which is undercut, and a member rotatively mounted on the tang-and provided with a cam'member fora binding engagement against one side Wall of the channel,'on'e edge portion of the tang" being of beveled form for engagement With such undercut Wall;

3. Thecomb'inationwith the barrel portion of a iniormnetercaliper providedwith a tang extended from the barrel portion angnlarly to the axis of thelatter, one edge portion of which tang is of'beveled form, of a frame member or yoke having at one end portion thereof a facewise opening channel, one side Wall of Which is undercut,-and said frame having a sector shaped recess Within its face adjacent and opening to the other side Wall of the channel, the are shaped Wall of said recess being undercut, and a member pivoted on the tanga-nd having a cam the edge-of which is beveled and operable under the rotation of saidpivoted member to both bind the tang in the channeledframe and to secure an'interloclr between the beveled edge portion of the cam and the under out Wall'ofthe sector shaped recess;

Signed by me at Springfield, Mass, in presence of 'tWo subscribing Witnesses.

HERMANN W. VQGES. lVitnesses:

G.- R. DRISCOLL, WM. S. BELLOWS.

Copies of this patent'may beobtained for five cents each, by addressing the Commissioner-of Patents; Washington; D. G. 

